The Apple Watch Sport also comes in a 42mm silver aluminum case with sports bands in those same colors. The 42mm silver aluminum cased Apple Watch Sport costs $399.

The second of the three varieties of the Apple Watch is just called Apple Watch. Here's the 38mm and 42mm Apple Watch in stainless steel cases with a white sports band. Respectively, they cost $549 and $599.

Screenshot

Here's the 38mm and 42mm Apple Watch in stainless steel cases with black sports bands, priced at $549 and $599.

Screenshot

These are the 38mm and 42mm Apple Watches in stainless steel cases with black classic buckles. They cost $649 and $699.

Screenshot

These are the 38mm and 42mm Apple Watches in stainless steel cases with Milanese loops. They're priced at $649 and $699.

Screenshot

This is the Apple Watch in a 38mm stainless steel case with a black modern buckle, priced at $749. It also comes in midnight blue, soft pink, and brown.

Screenshot

Here's the Apple Watch in a 42mm stainless steel case with a black leather loop, coming in at $699. It also comes in bright blue, stone, and light brown leather.

Screenshot

Here's the Apple Watch in 38mm and 42 mm stainless steel cases with link bracelets. They cost $949 and $999.

And finally, the Apple Watch Edition in 38mm 18-karat yellow gold case with a bright red modern buckle costs a whopping $17,000.

Apple

Now, let's take a look at how the Apple Watch works. The main piece of functionality on Apple Watch comes from the crown. Cook calls it a "digital crown," and it's used to zoom in and out or to scroll. You can press the crown to go back to the home screen.

Apple

When you raise your wrist, the display turns on.

Apple

The homescreen is a series of dots. Each dot is an app. The watch is touchscreen, so you can swipe.

Apple

The Apple Watch also has a magnetic charger.

Apple

Here's a better view.

Apple

Apple will let you customize your Apple Watch.

Apple

They come in different colors, too.

Apple

...And stainless steel straps.

Apple

It has a sleek design.

Apple

The Apple Watch has customizable information within it, like weather, a calendar, and other widgets.

Apple

Of course, you can play music on your Apple Watch too.

Apple

The Apple Watch has a "taptic engine," a vibration the watch sends to your wrist when you get notifications.

Apple/Screenshot

You can customize Apple Watch with the people you communicate with frequently. Their names and faces will appear in bubbles.

Apple

When you get a notification, you raise your wrist to see it and then swipe up to respond. Apple has predictive responses for you too.